\documentclass{exctemp2}
\usepackage{upgreek}

\begin{document}
    \newcommand{\rev}{^{-1}}
    \newcommand{\map}{\rightarrow}
    \newcommand{\tc}{\Rightarrow}
    \newcommand{\ii}{\text{i}}
    \newcommand{\ppi}{\uppi}
    \newcommand{\R}{\mathbb{R}}
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    \newcommand{\N}{\mathbb{N}}
    \newcommand{\Z}{\mathbb{Z}}
    \newcommand{\C}{\mathbb{C}}
    
    \title{\huge 《简明抽象代数》 习题答案}
    \date{\today}
    \author{TXFK}
    \maketitle

    \tableofcontents

    \chapter{群}
    \input{chapter 1/section 1.tex}
    \input{chapter 1/section 2.tex}
    \input{chapter 1/section 3.tex}
    \input{chapter 1/section 4.tex}

    
    

    

\end{document}